Wall shear stress
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:<math>\tau_w = \mu \left(\frac{\partial u}{\partial y} \right)_{y=0}</math> | :<math>\tau_w = \mu \left(\frac{\partial u}{\partial y} \right)_{y=0}</math> | ||
- | Where <math>\mu</math> is the [[Dynamic viscosity|dynamic viscosity]], <math>u</math> is the flow velocity | + | Where <math>\mu</math> is the [[Dynamic viscosity|dynamic viscosity]], <math>u</math> is the flow velocity parallel to the wall and <math>y</math> is the distance to the wall. |
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+ | The SI unit of wall shear stress is pascal (<math>Pa</math>), which is identical to <math>\frac{kg}{m\cdot s^2}</math>. |
Latest revision as of 10:21, 5 December 2012
The wall shear stress, , is given by:
Where is the dynamic viscosity, is the flow velocity parallel to the wall and is the distance to the wall.
The SI unit of wall shear stress is pascal (), which is identical to .